Samson QH4 4-Channel Headphone Amplifier REVIEW

In the past few years, I’ve really enjoyed listening to various podcasts. It’s been enlightening to hear people have intelligent conversations about topics I enjoy hearing about. I’ve often wondered what it would take to create a podcast with multiple people involved and how you could monitor something like that. After some research, I found that having a headphone amplifier to assist with something like a podcast can be quite beneficial. That’s when I found the QH4 from Samson.



  • Inputs: 2 x 1/4″ balanced, stereo 1/8″ unbalanced TRS
  • Outputs: 4 x stereo 1/4″ unbalanced, stereo 1/8″ unbalanced TRS
  • Controls: Master volume, master Mute, master Mono, 4 x Channel volume
  • Noise Floor: -114dBu, 22k BW unweighted
  • Maximum Output: 8.3 dBu, 1% THD+N, loaded 16R
  • Output Power: 282mW per side / 564mW per channel, loaded 32Ω
  • Dynamic Range: 22dB, 22k BW
  • Frequency Response: 17Hz–47kHz (-3dB)
  • Power: 15VDC adapter


When I got the amp out of the box, I was surprised at its size. It’s very compact and can easily be stored on a desktop without cluttering it up. I have a riser for my monitor and it fits very nicely beneath it, which made it, even more, easier to enjoy. Since the amp is meant to use with a computer interface, I plugged in an aux cable into the stereo mini input port. The other end plugged into my computer’s headphone jack. I then, plugged in the power cable and finally, my headphones to the front. I happen to have an awesome set of Marshall Monitor wired headphones that I specifically use for monitoring audio. They came with a 3.5mm socket so that you can use it with professional audio gear just like the QH4. I plugged the headphones into channel 4 (easiest port to use without tangling cables up) and started listening to some music.

I love that there are two different volume controls on this unit. The first is a master volume control which I pushed up to about 50%. I find that is a suitable master volume for most types of audio. The second volume control is the individual control for the channel. I turned up Channel 4 to about 25%. This was a perfect volume for me as I could hear the music perfectly clear and most of the ambient noise around me was filtered out. As an experiment, I decided to turn Channel 3 to 50% and Channel 2 to about 10%. I did this so that I could listen to the same piece of music on different channels at different volumes to test out independent volume control feature of the amp. I unplugged my headphones from Channel 4 and switched between Channels 2 & 3. Sure enough — each of the channels carried their own volume well and the quality of the sound did not falter.

One issue I did have was some pretty horrendous humming in the line from the input cable. I don’t believe this was the fault of the device at all. I believe that the cable I was using for input was just old and so the contacts weren’t as good as they used to be. I was able to remedy the situation by rotating the cable and wiggling it back and forth so that the contact was solid. Again, not an issue with the QH4 equipment, but I wanted to mention it in case someone else out there has this issue. It’s not uncommon — cables do get old — and if you experience this, you might want to invest in a newer cable.


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Originally published at on September 21, 2018.



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Mac Sources is an Information and Technology Company. We review all things technology-related. Our team also reports on tech news happening in the world. 